H5 video signal conversion cable is designed for those laptop without full-featured Type-C ports and macbook with M1/M2/M3 chips to use the Dual/Triple laptop screen extender. Macbook with M1/M2/M3 chips usually can only make one screen works because the chips only support one video signal output, with this H5 cable, you can make your macbook totally compatiable with the triple screen extender and make both screens work at the same time!